Hillary Clinton’s emails on her unsecured, homebrew server contained intelligence from the U.S. government’s most secretive and highly classified programs, according to an unclassified letter from a top inspector general to senior lawmakers.

Fox News exclusively obtained the text of the unclassified letter, sent Jan. 14 from Intelligence Community Inspector General I. Charles McCullough III. It laid out the findings of a recent comprehensive review by intelligence agencies that identified “several dozen” additional classified emails — including specific intelligence known as “special access programs” (SAP).

That indicates a level of classification beyond even “top secret,” the label previously given to two emails found on her server, and brings even more scrutiny to the presidential candidate’s handling of the government’s closely held secrets.